The drill holes made in an 8-7th c. BC glass vase from Syria have been studied with a scanning electron microscope using silicone rubber impressions. Scanning electron microscopy (SEM) photos indicated the use of an abrasive combined with a metal drill and a lubricant. Various experimental combinations were tried and the authors concluded that the craftsman used a copper drill with emery in an oil medium. A peculiar collar formed in the glass vessel holes is caused by plastic deformation of the metal rod as it overheats. Trials were carried out on modern glass and ancient glass cullet. -- AATA